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Bases, Cements & Liners Final Review
Terms in this set (111)
1. Barrier or protective layer needed to be placed on the tooth before the final restoration to reduce or eliminate what?
Post op sensitivity
2. Barrier or protective layer needed to be placed on the tooth before the final restoration to reduce or eliminate what?
At the Margin
3. What component acts as a barrier against chemical irritation, provide thermal insulation, and can resist the condensation forces on a tooth when placing a restoration?
Bases (example: zinc oxide eugenol/noneugenol zinc oxide)
4. What is a disadvantage of zinc oxide eugenol/noneugenol zinc oxide?
Inability to withstand the forces of condensation immediately after placement
5. What is an advantage of zinc oxide eugenol/noneugenol zinc oxide?
Excellent seal of the cavity preparation, reduces postoperative sensitivity.
6. How long should a clinician wait prior to placing amalgam above a ZOE base?
7. Powder/liquid combination that is an ideal base material since it can provide thermal insulation and will allow the condensation of amalgam several minutes after placement is called?
Zinc Oxyphosphate (ZOP)
8. What is the pH of Zinc Oxyphosphate (ZOP) when placed?
pH of approximately 3.5, is acidic when placed
9. What is the pH of Zinc Oxyphosphate (ZOP) after a week?
Rises to a pH of 6.9
10. Zinc Oxyphosphate (ZOP) should be performed on what?
Cold glass slab
11. Packages of Zinc Oxyphosphate (ZOP) contain how much more liquid?
12. Zinc Oxyphosphate (ZOP) can evaporate, mix quickly and?
13. What material is comparable to zinc oxyphosphate (ZOP)?
14. What is the name of the viscous liquid found in Zinc Polycarboxylate?
15. What adheres to the tooth via an interaction be-tween the carboxylic acid and the calcium in the dentin?
Zinc Polycarboxylate (ZPC)
16. Glass Ionomers and Resins are generally not used as?
17. When used under another restorative material, glass ionomers and resins are usually employed as a?
18. Using either a GI or composite resins as a base under amalgam was clinically acceptable (TRUE/FALSE)?
19. What component is stronger and thicker than a liner and may be up to 2 mm thick?
20. What provides pulp protection, may release fluoride, may irritate the pulp or is considered a replacement or substitute for destroyed dentin by caries or during cavity preparation.
21. When restorative material irritates pulp, a liner often is used in conjunction with a?
22. What is an advantage of Zinc oxide eugenol/noneugenol zinc oxide?
It is an excellent seal of the cavity preparation, reduces postoperative sensitivity.
23. What is an disadvantage of zinc oxide eugenol/noneugenol zinc oxide?
Inability to withstands the forces of condensation immediately after placement
24. How long should a clinician wait prior to placing amalgam above a Zinc Oxide Eugenol (ZOE) base?
25. What are cements?
Cements are anything that glues things to other materials.
26. What are 2 different purposes of cements?
- Retain restorations or appliances in a fixed position in the mouth
- Restorative filling material, used either alone or with other materials. In this situation, the material would be referred to as a base.
27. Dental cements are categorized as?
Either temporary (short-term) or permanent (final)
28. Dental cements should have no adverse effects on the pulp tissue, be of low solubility, have high compressive and tensile strengths, and be?
29. Cements has to be what?
Radiopaque , and be able to be seen on radiographs
30. Zinc Oxide Eugenol (ZOE) can be used as a?
31. What stimulates reparative dentine (secondary dentin)
32. A pulp exposure requires a pulp cap with zinc oxide eugenol prior to placing a restoration.
33. Cements ________ soluble than the overlying restoration.
34. Which of the following is a common additive to glass powder, reduces melting temperature, and improves the flow of molten glass?
35. Calcium hydroxide can be used as a temporary cement and is harder than ZOE based temporary cements and is easily removed from?
The margins of resin and PFM crowns
36. Zinc Oxide Eugenol/Noneugenol zinc oxide can be used as temporary cements (TRUE/FALSE)
37. What provides an effective seal at the tooth/restoration interface?
Zinc Oxide Eugenol (ZOE)
38. Zinc Oxide is insoluble and nontoxic (TRUE/FALSE)
39. Zinc oxide has oxide/ hydroxide and additives (TRUE/FALSE)
40. Aluminum oxide (alumina) provides what?
41. Magnesium oxide provides what?
Controls setting time
42. Zinc Oxide has some antibacterial properties?
43. Zinc oxide can be found in what?
Diaper rash cream, sun screen, and food powder products.
44. Zinc Polycarboxylate can be used as a temporary cement (TRUE/FALSE)
45. One disadvantage of Resin materials is that after the removal of a temporary restoration a clinician may find?
Brown stains on the tooth.
46. Zinc Oxide Eugenol can be used as a final cement (TRUE/FALSE)
47. Eugenol is what type of liquid?
An Organic liquid (weak acid)
48. Eugenol inhibits the free radical polymerization and also inhibits what?
Inhibits Setting of composite.
49. If Eugenol reduces irritation it is considered a/an?
50. Eugenol is oil based (TRUE/FALSE)
51. For ZOE and ZOP what determines power/liquid ratio?
Determined by clinician
52. For ZOE and ZOP what must happen for proper function?
Liquid must wet the powder for proper function.
53. For Glass Ionomer and Polycarboxylate cement what determines power/liquid ratio?
Determined by manufacturer, mixing time is important
54. What must be done immediately after mixing?
Important to clean all mixing armamentarium
55. Base or temporary cement will be _____ than luting agent?
56. Higher powder/liquid ratio produces what?
Higher strength, lower solubility and better cement-working time will decrease and viscosity increases.
57. When do we shade match?
Before the rubber dam
58. The time from the beginning of mixing until the beginning of setting is called?
59. The time from the start of the mix until material is set is called?
60. Strength of a base/liner primarily depends on what?
61. Strength of a base/line is affected by what?
62. Glass ionomer was developed by who?
Wilson and Kent
63. What is the aqueous solution commonly found in glass ionomer?
64. What is the glass powder commonly found in glass ionomer?
Acid soluble calcium or strontium fluoroaluminosilcate glass
65. For glass ionomers mixing powder and liquid causes acid to etch the glass which result in what?
Results in a release of calcium, aluminum, sodium and fluoride ions into solution
66. Glass ionomer chemically adheres to the tooth and is not as kind to the pulp as ZOE (TRUE/FALSE)
67. The pH of Glass Ionomer rises over time (TRUE/FALSE)
68. The coefficient of thermal expansion for Glass Ionomers which is similar to the tooth may prevent what?
69. Glass ionomers can reload fluoride through toothpaste, gel, varnishes (TRUE/FALSE)
70. Glass ionomers do not inhibit what?
71. What can cause the formation of fluorohydroxyapatite in the adjacent tooth structure?
72. Glass Ionomers are resistant to what?
73. Glass Ionomers are weaker (weaker strength, fracture resistance) than composite and Resin Modified Glass Ionomers (TRUE/FALSE)
74. Glass ionomers CANNOT be used in stress bearing areas (TRUE/FALSE)
75. Glass Ionomers are ideal for Class III, V, core build-ups, temporary restorations, pedo restoration and as a base (TRUE/FALSE)
76. What is the percentage of shrinkage that occurs during setting time of a Glass Ionomer?
77. Glass ionomer must be mixed within what time period?
78. If glass ionomer is mixed too slow what happens to the material?
Material becomes thick
79. What material is susceptible to dehydration or water uptake within the first 24 hours?
80. What do you not want to do with Glass Ionomer?
Do NOT dehydrate
81. What is the name of the technique where it is layered between tooth and composite to seal dentin (does not reach margin)
82. What technique brings the GI to the margin?
Cervical lining or "open sandwich" technique
83. Glass ionomers are considered what?
Hydrophilic (water loving)
84. Glass Ionomers are good for areas that can't be isolate for instance subgingival or root caries as well as good for primary teeth (TRUE/FALSE)
85. What glass ionomer products are found in the clinic?
Ketac Cem, Fuji IX
86. The aqueous solution found in a Resin Modified Glass Ionomer is what?
87. The powder found in a Resin Modified Glass Ionomer is what?
88. Resin Modified Glass Ionomer has similar biological effects to the traditional Glass Ionomer (TRUE/FALSE)
89. Postoperative sensitivity related to micoleakage from a Resin Modified Glass Ionomer could be due to what?
90. What are some RMGI found in the clinic?
Vitrebond, Fuji II, Fuji II LC
91. RMGI has a higher strength, is easier to use, has lower solubility and provides better esthetics than GI (TRUE/FALSE)
92. RMGI can better bond to the tooth and be finished earlier than GI (TRUE/FALSE)
93. RMGI is great in areas where isolation is difficult (TRUE/FALSE)
94. RMGI are biocompatible, have a thermal expansion similar to tooth, provides fluoride release, and recharged with fluoride and less placement steps compared to composite (TRUE/FALSE)
95. RMGI cannot finish the same luster as composite (TRUE/FALSE)
96. Calcium Hydroxide uses a two paste system that uses both a base and a catalyst (TRUE/FALSE)
97. Calcium Hydroxide layer must be no thicker than what?
98. Calcium hydroxide is considered what?
99. The pH of calcium hydroxide is what?
pH = 12= alkaline
100. Calcium hydroxide can be placed as a direct or indirect pulp cap (TRUE/FALSE)
101. Calcium hydroxide is considered what ?
102. Calcium hydroxide is easy to manipulate and hardens rapidly (TRUE/FALSE)
103. A liner or base must be used on top of CaOH
104. Resin based restorative materials will not bond to what?
Calcium Hydroxide (dycal)
105. Calcium hydroxide is low in strength and is highly soluble in water (TRUE/FALSe)
106. What does ART stand for?
Atraumatic Restorative Treatment
107. What does ART provides?
Provides minimal intervention approach to prevent caries and stop further progression, sealants, and restorations
108. What has a high viscosity, and involves GI pushed into pits and fissures under finger pressure?
109. What involves the removal of soft carious tooth tissue with hand instruments only then GI place restoration?
Art place restoration
110. What primary material is the choice for ART?
111. When is ART indicated?
- Very young children to arrest caries
- Rural areas where routine treatment is not possible
- Non-dentist can place ART to halt or lessen the progression of caries
- Controlling caries in patients with high caries rates
- Extreme dental fear/anxiety patients
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